How can doubling and halving help me multiply?

NARRATOR: Hello Snoot. Hello Fin.

BOTH: (ALIEN LANGUAGE)

NARRATOR: You're building a rocket, I see.

You've just got to attach the boosters and you'll be done.

SNOOT: (ALIEN LANGUAGE)

NARRATOR: It looks like you'll need 20 bolts to attach one booster.

Let's see what you've got in your tool box.

So Snoot, you've got 4 packs of 5 bolts.

4 times 5 equals 20.

Just the number we need.

FIN: (ALIEN LANGUAGE)

NARRATOR: Ok Fin, let's see what's in your toolbox.

You've got 2 packs of 10 bolts.

2 times 10 also equals 20!

Perfect!

SNOOT: (ALIEN LANGUAGE)

NARRATOR: I know Snoot, Fin's got exactly the same number of bolts as you just in different packs.

4 packs of 5 bolts equals 20.

And 2 packs of 10 bolts equals 20 as well.

So it doesn't matter if we use your packs or Fin's packs, we'll still have all the bolts we need.

We could even use 2 of your packs and 1 of Fin's packs.

2 times 5 is 10 and adding another 10 equals 20 bolts all together.

BOTH: Aha!

NARRATOR: Right then, let's get these boosters bolted on, shall we?

(DRILLING)

(CRASH)

NARRATOR: Ah…

you're going to need more than bolts to fix that.