A rope is wrapped five times around a wooden stick, and 45 meters are left, and after two more turns, there are 27 meters left. Ask: How many meters was the rope originally?
一根绳子绕木棍五圈后剩45米，又绕了两圈，剩27米，问：绳子原来多少米？
<gadget id="calculator">45 - 27</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<gadget id="calculator">45 + 45</gadget>
<output>90</output>

<result>90</result>