There are two ropes, one is 42 decimeters long and the other is 48 decimeters long. Now we need to cut them into small pieces of the same length, and there is no surplus. What is the longest length of each piece of rope?
有两根绳子，一根长42分米，另一根长48分米，现在要把它们剪成同样长的小段，且都没有剩余，每段绳子最长应是多少米．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>