A number is 0.8 more than 85% of B number. The sum of the two numbers of A and B is 56.3, what is the number of B?
甲数比乙数的85%多0.8．甲乙两数的和是56.3，乙数是多少？
<gadget id="calculator">56.3 - 0.8</gadget>
<output>55.5</output>

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 + (17/20)</gadget>
<output>37/20 = around 1.85</output>

<gadget id="calculator">55.5 / (37/20)</gadget>
<output>30</output>

<result>30</result>