A piece of steel is 15dm long and has a cross-sectional area of 1.2dm**2. If it is calcined into a steel bar with a cross-sectional area of 0.1dm**2, what is the length of this steel bar in dm?
一段钢材长15dm，横截面积是1.2dm**2．如果把它煅烧成一横截面面积是0.1dm**2的钢筋，这根钢筋的长是多少dm．
<gadget id="calculator">15 / 0.1</gadget>
<output>150</output>

<gadget id="calculator">1.2 * 150</gadget>
<output>180</output>

<result>180</result>