After sawing a strip 5 cm wide from a square plank, the remaining area is 750 cm2. What is the area in square centimeters of the sawn strip.
从一块正方形木板上锯下5厘米宽的一个木条后，剩下的面积是750平方厘米．问锯下的木条的面积是多少平方厘米．
<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<result>150</result>