如果两个文本框值都禁用，则获取两个文本框值的倍数

<input type="text" id="textbox1" disabled>
<input type="text" id="textbox2" disabled>
<input type="hidden" id="hiddenValue1">
<input type="hidden" id="hiddenValue2">
<button onclick="calculateMultiplication()">计算倍数</button>

function calculateMultiplication() {
  var textbox1 = document.getElementById("textbox1");
  var textbox2 = document.getElementById("textbox2");
  var hiddenValue1 = document.getElementById("hiddenValue1");
  var hiddenValue2 = document.getElementById("hiddenValue2");

  hiddenValue1.value = textbox1.value;
  hiddenValue2.value = textbox2.value;

  var value1 = parseInt(hiddenValue1.value);
  var value2 = parseInt(hiddenValue2.value);

  var multiplication = value1 * value2;
  alert("倍数为：" + multiplication);
}