school wants to build a reservoir with a length of 8 meters, a width of 6 meters, and a depth of 20 decimeters. If a layer of cement is to be applied to the four walls and bottom of the pool, how many square meters is the area to be covered with cement? If 72 cubic meters of water are to be poured into the pool, how deep should the water be in the pool?
某校要建一个长8米、宽6米，深20分米的蓄水池，如果要在水池的四壁和底面抹上一层水泥，抹水泥的面积是多少平方米？如果在池中要注入72立方米的水、水池内的水应有多深？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">72 / 48</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>