A wire uses 31.87 meters, which is 8.99 meters less than the rest. How long is this wire in meters?
一根电线，用去31.87米，比剩下的少8.99米，这根电线长多少米？
<gadget id="calculator">31.87 + 8.99 + 31.87</gadget>
<output>72.73</output>

<result>72.73</result>