The length of a rectangle is 4 cm and the width is 3 cm. How many small squares of 1 cm2 can be cut out of this rectangle?
一个长方形的长是4厘米，宽是3厘米，这个长方形可以切出多少个1平方厘米的小正方形．
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>