10 tons of goods are shipped in 5 times on average, how much of this batch is shipped in 2 times
10吨货物，平均分5次运完，2次运了这批的多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>