There are 3,000 tons of goods stacked in the warehouse, and 15% of them have been shipped away. How many tons are left?
仓库里堆放着3000吨货物，运走了15%，还剩多少吨？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">3_000 * (17/20)</gadget>
<output>2_550</output>

<result>2_550</result>