pile of goods is transported by team A alone 10 times and by team B 12 times. The two teams can transport 49.5 tons at one time. How many tons does this pile of goods have?
一堆货物，由甲队独运10次运完，由乙队独运12次运完，两个车队合运一次能运49.5吨，这堆货物共有多少吨？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/10) + (1/12)</gadget>
<output>11/60 = around 0.183333</output>

<gadget id="calculator">49.5 / (11/60)</gadget>
<output>270</output>

<result>270</result>