How much does it cost to trade forex?

Lets say the EUR/USD is at 1.40000 and i want to buy 100,000 of that currency, would i multiply 1.40000 times 100,000 to get me the price of how much i would have to pay? because if that is true i would need $140,000 to trade this currency and that is way more than what my margin is. can someone explain please.