A piece of rectangular paper is 40 cm long and 28 cm wide. If you want to cut it into the largest square piece of paper, how many pieces can you cut in total?
一张长方形的纸，长40厘米，宽28厘米，要把它截成边长是最大的正方形纸片，一共可以截多少块？
<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<gadget id="calculator">7 * 10</gadget>
<output>70</output>

<result>70</result>