For a wire, the decoration workers cut off 7 sections of the same length, each section is 18 meters long, and there are 45 meters left. How many meters is this wire originally?
一根电线，装修工人剪去同样长的7段，每段长18米，还剩下45米，这根电线原来有多少米？
<gadget id="calculator">18 * 7</gadget>
<output>126</output>

<gadget id="calculator">126 + 45</gadget>
<output>171</output>

<result>171</result>