swimming pool is 50 meters long, 30 meters wide, and 1.5 meters deep. A layer of cement is applied to the bottom and walls of the pool. If 5 kilograms of cement is used per square meter, how many kilograms of cement are needed in total?
一个游泳池长50米，宽30米，深1.5米，在池的底面和四壁抹上一层水泥．如果每平方米用水泥5千克，一共需要水泥多少千克？
<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<gadget id="calculator">50 * 1.5</gadget>
<output>75</output>

<gadget id="calculator">30 * 1.5</gadget>
<output>45</output>

<gadget id="calculator">75 + 45</gadget>
<output>120</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">1_500 + 240</gadget>
<output>1_740</output>

<gadget id="calculator">1_740 * 5</gadget>
<output>8_700</output>

<result>8_700</result>