The ratio of coal consumption in the school cafeteria in September and October is 8:7, and the coal consumption in September is (3/4) tons. How many tons of coal was used in October?
学校食堂九月份和十月份用煤量的比是8：7，九月份用煤(3/4)吨．十月份用煤多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(3/4) * (7/8)</gadget>
<output>21/32 = around 0.65625</output>

<result>21/32 = around 0.65625</result>