The ratio of number A to number B is 8:5. It is known that the difference between the two numbers is 40. What is the number B?
甲数和乙数的比是8：5，已知两数相差40，乙数是多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">40 / 3</gadget>
<output>40/3 = around 13.333333</output>

<gadget id="calculator">(40/3) * 5</gadget>
<output>200/3 = around 66.666667</output>

<result>200/3 = around 66.666667</result>