A piece of rectangular cardboard with a length of 18 cm and a width of 8 cm can be cut into how many small squares with an area of 4 square centimeters.
一张长18厘米，宽8厘米的长方形纸板，可剪成面积是4平方厘米的小正方形多少块．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<result>36</result>