How many squares with an area of 1 square centimeter can be cut from a rectangular piece of paper with a length of 9 cm and a width of 5 cm?
一个长9厘米，宽5厘米的长方形纸，可以剪成多少个面积是1平方厘米的正方形．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>