If it takes 4 minutes to saw a piece of wood into 4 pieces, how many minutes will it take to saw it into 7 pieces?
一根木料锯成4段要4分钟，锯成7段要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">(4/3) * 6</gadget>
<output>8</output>

<result>8</result>