A piece of round steel is 8 meters long, saw off (3/4), saw off another 0.5 meters, how many meters are left.
一根圆钢长8米，锯下(3/4)，又锯下米0.5米，还剩下多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">8 * (3/4)</gadget>
<output>6</output>

<gadget id="calculator">8 - 6 - 0.5</gadget>
<output>1.5</output>

<result>1.5</result>