Tape deck recording?

Hello, I have 4 digital tracks (can make them mp3, wav. etc) and I just want to record them to a cassette. I just did it really poorly with a GPX portable cassette player, but this bad boy just doesn’t have an input for this and had to go through the built-in mic. I also have only Normal Bias cassettes if you have high, but not necessary. Does anyone have the set up for this? Will pay of course! Hoping to get this done ASAP.