A pile of goods was transported away (3/8) for the first time, and the rest (1/2) was transported away for the second time. At this time, there are still 15 tons left. How many tons does this pile of goods weigh in total?
一堆货物，第一次运走了(3/8)，第二次运走了剩下的(1/2)，这时还剩15吨，原来这堆货物共重多少吨？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/8) * (1/2)</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">1 - (3/8) - (5/16)</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">15 / (5/16)</gadget>
<output>48</output>

<result>48</result>