What is the difference between the operation result of 5*(□+0.45) and the operation result of 5*□+0.45?
5*(□+0.45)的运算结果与5*□+0.45的运算结果相差多少．
<gadget id="calculator">5 * 0.45</gadget>
<output>2.25</output>

<gadget id="calculator">2.25 - 0.45</gadget>
<output>1.8</output>

<result>1.8</result>