A wire is 120 meters long, how many meters are left after cutting off (1/3)
一根电线长120米，截去(1/3)后，还剩下多少米
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">120 * (1/3)</gadget>
<output>40</output>

<gadget id="calculator">120 - 40</gadget>
<output>80</output>

<result>80</result>