Chen Tao spent (3/4) hours painting, and practiced calligraphy (1/6) hours less than painting. How many hours did Chen Tao practice calligraphy?
陈涛画画用了(3/4)小时，练字的时间比画画少用了(1/6)小时，陈涛练字用了多少小时？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(3/4) - (1/6)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>