The school playground is 150 meters long and 80 meters wide. First, spread 10 cm thick mixed soil on it, and then spread 8 cm thick stones. How many square meters of mixed soil and stones are needed?
学校操场长150米，宽80米，先在上面铺10厘米厚的混合土，再铺8厘米厚的石子，需要混合土和石子共多少方？
<gadget id="calculator">150 * 80</gadget>
<output>12_000</output>

<gadget id="calculator">0.1 + 0.08</gadget>
<output>0.18</output>

<gadget id="calculator">12_000 * 0.18</gadget>
<output>2_160</output>

<result>2_160</result>