A bundle of ropes is 600 meters long, 37 meters are used for the first time, and 63 meters are used for the second time. How many meters is the bundle of ropes shorter than the original one?
一捆绳子长600米，第一次用去37米，第二次又用去63米，这捆绳子比原来短了多少米．
<gadget id="calculator">37 + 63</gadget>
<output>100</output>

<result>100</result>