After cutting 180 meters from a rope, what remains is 4 times the cut length. How long was the rope originally?
一根绳子剪去180米后，剩下的是剪去的4倍，这根绳子原来长多少？
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">180 * 5</gadget>
<output>900</output>

<result>900</result>