The average score of Xiao Ming's previous 4 math tests is 86. If he wants to raise the average score of the first 5 math tests to 88, what score must he take in the 5th test?
小明前4次数学考试平均分为86分，如果他想使前5次数学考试的平均分上升到88分，他的第5次考试必须要考多少分．
<gadget id="calculator">88 * 5</gadget>
<output>440</output>

<gadget id="calculator">86 * 4</gadget>
<output>344</output>

<gadget id="calculator">440 - 344</gadget>
<output>96</output>

<result>96</result>