A bus is full when it leaves station A. When it arrives at station B, (1/4) of the passengers get off, and 15 people get on the bus. At this time, there are still 3 people without seats. How many people are there on the bus now?
一辆客车从甲站开出时正好满座，到达乙站是有(1/4)的乘客下车，又有15人上车，这时还有3人没有座位，现在车上有多少人．
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">12 / (1/4)</gadget>
<output>48</output>

<gadget id="calculator">48 + 3</gadget>
<output>51</output>

<result>51</result>