a certain drink of type a is prepared by mixing 4 parts milk with 3 parts fruit juice. another drink of type b is prepared by mixing 4 parts of fruit juice and 3 parts of milk. how many liters of fruit juice must be added to 84 liters of drink a to convert it to drink b?  Choose the correct choice from the following answers
A) 24  B) 28  C) 32  D) 36  E) 40
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) * 84</gadget>
<output>48</output>

<gadget id="calculator">48 * 4</gadget>
<output>192</output>

<gadget id="calculator">192 / 3</gadget>
<output>64</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/7) * 84</gadget>
<output>36</output>

<gadget id="calculator">64 - 36</gadget>
<output>28</output>

<result>B</result>
a certain drink of type a is prepared by mixing 4 parts milk with 3 parts fruit juice. another drink of type b is prepared by mixing 4 parts of fruit juice and 3 parts of milk. how many liters of fruit juice must be added to 84 liters of drink a to convert it to drink b?
subtract(divide(multiply(multiply(divide(4, add(4, 3)), 84), 4), 3), multiply(divide(3, add(4, 3)), 84))
"in 84 liters of drink a , there are 48 liters of milk and 36 liters of juice . with 48 liters of milk , we need a total of 64 liters of juice to make drink b . we need to add 28 liters of juice . the answer is b ."