A cuboid of wood, 2 meters long, 5 meters wide and 5 meters thick, is sawn into two pieces of 1 meter long, how many square meters is the surface area increased?
一根长方体木料，长2米，宽和厚都是5米，把它锯成1米长的两段，表面积增加了多少平方米．
<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>