The worker uncle sawed a steel pipe 4 times, and each section was 12 meters long. How long was the steel pipe originally?
工人叔叔把一根钢管锯4次，每段长12米，这根钢管原来长多少米？
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<result>60</result>