A piece of steel is 15 decimeters long and its cross-sectional area is 1.2 square centimeters. If it is forged into a steel bar with a cross-sectional area of 0.1 square centimeters, find the length of this steel bar.
一段钢材长15分米，横截面积是1.2平方厘米，如果把它锻造成一个横截面积是0.1平方厘米的钢筋，求这根钢筋的长．
<gadget id="calculator">10 / 0.1 / 100</gadget>
<output>1</output>

<gadget id="calculator">1.2 * 15 * 1</gadget>
<output>18</output>

<result>18</result>