Define operation: a⊙b=3a+5ab+kb, where a and b are any two numbers, and k is a constant. For example: 2⊙7=3*2+5*2*7+7k. If 5⊙2=73. Then 8⊙5=how much.
定义运算：a⊙b=3a+5ab+kb，其中a，b为任意两个数，k为常数．比如：2⊙7=3*2+5*2*7+7k．若5⊙2=73．则8⊙5=多少．
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">5 * 8 * 5</gadget>
<output>200</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">24 + 200 + 20</gadget>
<output>244</output>

<result>244</result>