There are two pieces of wood, one with a length of 2015mm and the other with a length of 755mm. They must be sawn into small sections of the same length without any surplus, but each sawing will consume 1mm of wood. The longest piece of wood can be How many millimeters?
有两根木料，一根长2015毫米，另一根长755毫米，要把它们锯成同样长的小段，不许有剩余，但每锯一次要损耗1毫米的木料，每小段木料最长可以是多少毫米？
<gadget id="calculator">2 * 2 * 3 * 3 * 7</gadget>
<output>252</output>

<gadget id="calculator">252 - 1</gadget>
<output>251</output>

<result>251</result>