A 5m long square steel is cut into two sections and the surface area is increased by 60cm**2. What is the original volume of the square steel in cm**3.
一根5m长的方钢，把它横截成2段表面积增加60cm**2，原来方钢的体积是多少cm**3．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">5 * 100</gadget>
<output>500</output>

<gadget id="calculator">30 * 500</gadget>
<output>15_000</output>

<result>15_000</result>