When the little sloppy calculated 28*(□+2), he miscalculated as 28*□+2, how much more the correct result is than the wrong result.
小马虎在计算28*(□+2)时，错算成了28*□+2，正确结果比错误结果多多少．
<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<gadget id="calculator">56 - 2</gadget>
<output>54</output>

<result>54</result>