Because if you buy 500 grams, you get 0.05 kilograms.

So 98 yuan actually bought 0.5+0.05=0.55 Jin of tea.

Because uncle Li wants to buy 2.2 kilograms.

Therefore, if 2.2 is divided by 0.55=4, for every 0.55 kg of tea in 98 yuan, * * * needs 4 pieces of 0.55 kg.

So 4 times 98=392 yuan.