If twice a number minus half of this number yields 2013, what is the number?
如果一个数的两倍减去这个数的一半，得2013，那么这个数是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 - (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">2_013 / (3/2)</gadget>
<output>1_342</output>

<result>1_342</result>