Divide a 60-meter-long wire into 4 sections on average. The second section accounts for ((())/(())) of the total length. How many meters is the third section?
把一根长60米的电线平均分成4段，第2段占全长的((())/(()))，第3段长多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">60 * (1/4)</gadget>
<output>15</output>

<result>15</result>