In a mathematics test, the average score of the top ten students is 87 points, and the average score of the top eight students is 90 points. It is known that the ninth place has 2 points more than the tenth place.
一次数学考试，前十名的同学的平均分是87分，前八名的平均分是90分，已知第九名比第十名多2分，第十名考多少分．
<gadget id="calculator">87 * 10</gadget>
<output>870</output>

<gadget id="calculator">90 * 8</gadget>
<output>720</output>

<gadget id="calculator">870 - 720</gadget>
<output>150</output>

<gadget id="calculator">150 / 2</gadget>
<output>75</output>

<gadget id="calculator">75 - 1</gadget>
<output>74</output>

<result>74</result>