For a cup of milk tea, the ratio of milk to tea is 2:3. If you add 50 grams of milk, the ratio of milk to tea is now 4:3. How many grams does this bottle of milk tea have?
一杯奶茶，奶和茶的比是2：3，如果再加上50克奶，现在奶与茶的比是4：3，这瓶奶茶原有多少克．
<gadget id="calculator">350 - 200</gadget>
<output>150</output>

<gadget id="calculator">14 / 5</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">4 - (14/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">150 / (6/5)</gadget>
<output>125</output>

<result>125</result>