The original 80 meters of a steel pipe is used up (3/5), how many decimeters are left?
一根钢管原有80米，用去(3/5)，剩下多少分米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * (2/5) * 10</gadget>
<output>320</output>

<result>320</result>