How many small pieces of paper 5 cm x 4 cm can be cut from a 40 cm x 20 cm piece of paper?
在40厘米*20厘米的纸片上最多可以剪下多少张5厘米*4厘米的小纸片．
<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>