A piece of iron wire is 100 meters long, 37 meters are used for the first time, and 48 meters are used for the second time. How many meters is the length of the iron wire shorter than before? What is the correct column
一根铁丝长100米，第一次用去37米，第二次用去48米，现在铁丝的长度比原来短了多少米？列式正确的是多少
<gadget id="calculator">37 + 48</gadget>
<output>85</output>

<result>85</result>