The number of A is 306, and the number of B is 190 less than 15 times of the number of A. What is the number of B?
甲数是306，乙数比甲数的15倍少190，乙数是多少？
<gadget id="calculator">306 * 15</gadget>
<output>4_590</output>

<gadget id="calculator">4_590 - 190</gadget>
<output>4_400</output>

<result>4_400</result>