How many krones do I have to exchange for a trip to Prague, Czech Republic?

We just went to the Czech Republic on April 30th, and the tour leader said that everyone suggested to exchange 150 Euro * in cash for the country, otherwise it would be randomly selected and refused entry. Each of us obediently exchanged 1050 euros, but we didn't find it in the end. We have to change some crowns at the airport, so we'd better change enough cars. We exchanged 100 euros and lost a lot. Take the bus and subway for 90 minutes and 32 kronor. In China, RMB can only be exchanged for euros, not krona. When you arrive in the Czech Republic, you can change euros into krones. At the airport, you can exchange 100 euros for 1992. You can exchange 100 euros for 2550 kroner in the city in the future.

VISA cards can be swiped in some places.