cube of iron with a side length of 4 cm is submerged in a cylindrical measuring cup, and the water level rises by 0.8 cm. What is the area of the bottom of the measuring cup measured from the inside?
将一块棱长为4厘米的正方体铁块浸没在一个圆柱形量杯中，水面升高0.8厘米，量杯从里面量得的底面积是多少？
<gadget id="calculator">4 / 0.8</gadget>
<output>5</output>

<gadget id="calculator">4 * 4 * 5</gadget>
<output>80</output>

<result>80</result>