A square swimming pool has a side length of 20m and a depth of 2m. Now it is necessary to put cement on the side and bottom of the swimming pool. It is known that the cement costs 300 yuan per square meter, so how much will it cost in total?
一个正方形游泳池，边长为20m，深为2m．现在要在游泳池的侧面和底面抹上水泥，已知每平方米的水泥要花300元，那么总共要花费多少元？
<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<gadget id="calculator">20 * 2 * 4</gadget>
<output>160</output>

<gadget id="calculator">400 + 160</gadget>
<output>560</output>

<gadget id="calculator">560 * 300</gadget>
<output>168_000</output>

<result>168_000</result>