YOU SAID:
I’m walking up the stairs while baking a cake
INTO JAPANESE
ケーキを焼きながら階段を上っています
BACK INTO ENGLISH
I'm climbing the stairs while baking a cake
INTO JAPANESE
ケーキを焼きながら階段を登っています
BACK INTO ENGLISH
Climbing the stairs while baking a cake
INTO JAPANESE
ケーキを焼きながら階段を登る
BACK INTO ENGLISH
Climb the stairs while baking the cake
INTO JAPANESE
ケーキを焼きながら階段を上る
BACK INTO ENGLISH
Climb the stairs while baking the cake
That didn't even make that much sense in English.