Please choose a bedroom you like for simple decoration, and lay square floor tiles with a side length of 50 cm. If the price of each floor tile is 20 yuan, how much does it cost to decorate this bedroom?
请你选一间喜欢的卧室进行简单的装修，铺上边长是50厘米的正方形地板砖，如果每块地板砖的售价是20元，装修这间卧室需要多少元？
<gadget id="calculator">50 * 50</gadget>
<output>2_500</output>

<gadget id="calculator">10_000 / 2_500</gadget>
<output>4</output>

<gadget id="calculator">3 * 5 * 4 * 20</gadget>
<output>1_200</output>

<result>1_200</result>