Xiao Gang sawed a 10-meter-long log into 5 sections, each time taking 4 minutes, how many minutes in total?
小刚把一根10米长的木头锯成5段，每次用4分钟，一共要几分钟？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>