A piece of steel with a length of 7.2 meters is sawed into short pieces of steel with a length of 0.9 meters. It takes 35 seconds.
有一根长7.2米的钢材锯成每段长0.9米的短钢材，需要35秒钟，若改成锯成每段长0.8米的短钢材，需要多少秒钟．
<gadget id="calculator">7.2 / 0.9</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">35 / 7</gadget>
<output>5</output>

<gadget id="calculator">7.2 / 0.8</gadget>
<output>9</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<result>40</result>