When Xiao Ming calculates 100-□*3, he does the subtraction first, and then the multiplication. The result is 210. What is the correct result?
小明在计算100-□*3时，先算减法，再算乘法，得到的结果是210，正确的结果是多少．
<gadget id="calculator">210 / 3</gadget>
<output>70</output>

<gadget id="calculator">100 - 70</gadget>
<output>30</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">100 - 90</gadget>
<output>10</output>

<result>10</result>