If it takes (13/4) minutes to saw a piece of wood of uniform thickness into two pieces, how many minutes will it take to saw it into five pieces?
把一根粗细均匀的木料锯成两段耗时(13/4)分钟，那么将它锯成5段要耗时多少分钟．
<gadget id="calculator">13 / 4</gadget>
<output>13/4 = around 3.25</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">(13/4) * 4</gadget>
<output>13</output>

<result>13</result>