A triangle has an interior angle with a degree-to-degree ratio of 3:7:10. What is the largest interior angle? What kind of triangle is this?
三角形，有一个内角的度数比是3：7：10，最大的内角是多少度？这是个什么三角形？
<gadget id="calculator">3 + 7 + 10</gadget>
<output>20</output>

<gadget id="calculator">10 / 20</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">180 * (1/2)</gadget>
<output>90</output>

<result>90</result>