Divide (4/7) ton of coal into 4 equal parts, how much is each part in 1 ton
把(4/7)吨煤平均分成4份，每份是1吨的多少
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(4/7) * (1/4)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>