The average score of Lili Chinese, Mathematics, and English is 90 points. It is known that the sum of Chinese and English is 70 points more than Mathematics. How much does she score in Mathematics?
丽丽语文、数学、英语三科的平均分是90分，已知语文和英语的和比数学多70分，求她数学得多少分？
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 - 70</gadget>
<output>200</output>

<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<result>100</result>