A piece of wood has a cross-sectional area of 100 square centimeters and a length of 15 meters. After using (3/5), how many cubic centimeters of wood are left?
一根木料的横截面面积为100平方厘米，长15米．用去(3/5)后，还剩下多少立方厘米木料？
<gadget id="calculator">15 * 100</gadget>
<output>1_500</output>

<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">100 * 1_500 * (2/5)</gadget>
<output>60_000</output>

<result>60_000</result>