A piece of wood is 2.5 meters long, and it takes 1 hour to saw each piece of 0.5 meters long, and according to the needs, the wood should be sawed into several sections with a length of 15 cm and 14 cm. 15 cm long should be as much as possible, and there should be no surplus, so how many hours will it take?
一根木料长2.5米，若锯成每段长0.5米需1小时，而根据需要，要将这根木料锯成15厘米和14厘米长的若干段．15厘米长的要尽量多，且不能有剩余，那么需要多少小时？
<gadget id="calculator">1 * 60</gadget>
<output>60</output>

<gadget id="calculator">2.5 / 0.5</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">5 + 11</gadget>
<output>16</output>

<gadget id="calculator">16 / 60</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">15 * (4/15)</gadget>
<output>4</output>

<result>4</result>