YOU SAID:

set the duck on the flat cast next to the bat

INTO JAPANESE

アヒルをバットの隣のフラットキャストにセットする

BACK INTO ENGLISH

Place the duck in a flat cast next to the bat

INTO JAPANESE

アヒルをバットの隣に平らなキャストで置きます

BACK INTO ENGLISH

Place the duck in a flat cast next to the bat