When Xiaojun calculated 68*(☆+2), he copied the formula into 68*☆+2, so how much is the difference between the calculated result and the correct value.
小军在计算68*(☆+2)时把算式抄成68*☆+2，这样计算的结果与正确值相差多少．
<gadget id="calculator">136 - 2</gadget>
<output>134</output>

<result>134</result>