(1/2) of a certain number is 19 less than (2/3) of this number, what is this number?
某数的(1/2)比这个数的(2/3)少19，这个数是多少？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">19 / (1/6)</gadget>
<output>114</output>

<result>114</result>