190 is expressed as the sum of 10 consecutive even numbers, what is the largest even number among them.
190表示成10个连续偶数的和，其中最大的偶数是多少．
<gadget id="calculator">6 + 9</gadget>
<output>15</output>

<gadget id="calculator">2 * 15</gadget>
<output>30</output>

<result>30</result>