The original batch of goods in the warehouse, first shipped out (5/12), and then shipped in 30 tons. At this time, the warehouse goods are 15 tons more than the original ones. How many tons are the existing goods?
仓库原有一批货物，先运出它的(5/12)，再运进30吨，这时仓库货物比原来多15吨，现有货物多少吨？
<gadget id="calculator">30 - 15</gadget>
<output>15</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">15 / (5/12)</gadget>
<output>36</output>

<gadget id="calculator">36 + 15</gadget>
<output>51</output>

<result>51</result>