1.
If (a⃗×b⃗)2+(a⃗⋅b⃗)2=676(\vec{a} \times \vec{b})^2 + (\vec{a} \cdot \vec{b})^2 = 676 and ∣b⃗∣=2|\vec{b}| = 2, then ∣a⃗∣|\vec{a}| is equal to