40 slices per watermelon and each slice having 20 black seeds means each watermelon has 20*40=<<20*40=800>>800 black seeds.

40 slices per watermelon and each slice having 20 white seeds means each watermelon has 20*40=<<20*40=800>>800 white seeds.

In total, each watermelon has 800+800=<<800+800=1600>>1600 seeds.

What is the total number of seeds in a watermelon?

# Answer

1,600
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Val cuts a single watermelon into 40 slices, and each slice has 20 black seeds and 20 white seeds. What is the total number of seeds in a watermelon?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1,600
Val cuts a single watermelon into 40 slices, and each slice has 20 black seeds and 20 white seeds. What is the total number of seeds in a watermelon?
train