In the first half of 2012, the electricity consumption of Xuemingyuan Community was 120 kilowatts. In the second half of the year, due to the increase in the number of residents, the electricity consumption in the second half of the year was more than that in the first half of the year (3/4), and the electricity consumption in September this year was the second half of 2012. 10% of. How many kilowatts of electricity will the community use in September this year?
学明园小区2012年上半年用电是120千瓦，下半年由于入住人口增加，下半年的用电比上半年用电多了(3/4)，且今年9月份用电是2012年下半年的10%．求今年九月份小区用电多少千瓦？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">120 * (7/4) * (1/10)</gadget>
<output>21</output>

<result>21</result>