A (4/5) meter long log is sawed into 4 sections, and it takes (1/4) minutes to saw each section. How many minutes does it take in total?
一根长(4/5)米的圆木锯成4段，每锯下一段要(1/4)分钟，一共用时多少分钟
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">(1/4) * 3</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>