The school cafeteria uses 640 cubic meters of gas in September, and the planned gas consumption in October is September (9/10), but the actual gas consumption in October is less than the original plan (1/12), how many cubic meters of gas is saved in October?
学校食堂九月份用煤气640立方米，十月份计划用气是九月份的(9/10)，而十月份实际用气比原计划节约(1/12)，十月份节约用气多少立方米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">640 * (9/10) * (1/12)</gadget>
<output>48</output>

<result>48</result>