conversations.from: human
conversations.value: I need help with this problem:
  Mr. Llesis had 50 kilograms of rice. He kept 7/10 of it in storage and gave the rest to Mr. Everest. How many kilograms of rice did Mr. Llesis keep than Mr. Everest?
conversations.from: assistant
conversations.value: Mr. Llesis kept 50 x 7/10 = 35 kilograms of rice.
  So, he gave 50 - 35 = 15 kilograms of rice to Mr. Everest.
  Therefore, Mr. Llesis kept 35 - 15 = 20 kilograms more than Mr. Everest.