Did you know that we have special adverbs that mean “two times”, “three times”, “four times”, etc.? To be able to form them, you have to add the prefix в to the collective number (двое, трое, четверо, пятеро, etc.).
вдвое (two times), втрое (three times), вчетверо (four times), впятеро (five times), etc.
Он тратит вдвое больше денег сейчас. He spends twice as much money now.