Multiplication Blocks
About this app
Visualize multiplication with blocks
Multiplication Blocks Multiplication Blocks Number 1: Number 2: Visualize
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Source
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Multiplication Blocks</title>
<meta name="description" content="Visualize multiplication with blocks">
<meta name="keywords" content="multiplication, blocks, visualization">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<!-- Built-In Functions for Apps -->
<script type="text/javascript">
var localStoragePrefix = "ct-16894023093577";
var lastSave = 0;
// save to localstorage
function saveLocal(data) {
if (Date.now() - lastSave < 1000) {
return;
}
// save to cookie
let cookie = localStoragePrefix + "=" + JSON.stringify(data) + "; path=" + window.location.pathname + "'; SameSite=Strict";
cookie += "; expires=" + new Date(Date.now() + 1000 * 60 * 60 * 24 * 365 * 1000).toUTCString();
document.cookie = cookie;
lastSave = Date.now();
}
// load from localstorage
function loadLocal() {
var cookiePrefix = localStoragePrefix + "=";
var cookieStart = document.cookie.indexOf(cookiePrefix);
if (cookieStart > -1) {
let cookieEnd = document.cookie.indexOf(";", cookieStart);
if (cookieEnd == -1) {
cookieEnd = document.cookie.length;
}
var cookieData = document.cookie.substring(cookieStart + cookiePrefix.length, cookieEnd);
return JSON.parse(cookieData);
}
}
</script>
<script type="text/javascript">
// App Javascript Goes Here
function visualizeMultiplication() {
var num1 = parseInt($('#num1').val());
var num2 = parseInt($('#num2').val());
var result = num1 * num2;
var blocks = [];
for (var i = 0; i < result; i++) {
var digit = Math.pow(10, i);
var color = 'yellow';
if (digit >= 10 && digit < 100) {
color = 'orange';
} else if (digit >= 100) {
color = 'red';
}
blocks.push({
digit: digit,
color: color
});
}
var html = '';
for (var j = blocks.length - 1; j >= 0; j--) {
var block = blocks[j];
html += '<div class="block ' + block.color + '">' + block.digit + '</div>';
}
$('#blocks-container').html(html);
}
</script>
<style>
/* App CSS Goes Here */
.block {
display: inline-block;
margin: 5px;
padding: 10px;
font-size: 18px;
font-weight: bold;
text-align: center;
border-radius: 5px;
}
.yellow {
background-color: #FFFF00;
}
.orange {
background-color: #FFA500;
}
.red {
background-color: #FF0000;
}
</style>
</head>
<body>
<div id="main-container" class="container">
<h1>Multiplication Blocks</h1>
<div>
<label for="num1">Number 1:</label>
<input type="number" id="num1" min="1" max="9999">
</div>
<div>
<label for="num2">Number 2:</label>
<input type="number" id="num2" min="1" max="9999">
</div>
<button onclick="visualizeMultiplication()">Visualize</button>
<div id="blocks-container"></div>
</div>
</body>
</html>
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