$\frac{\sqrt\[3]{6859}}{\sqrt\[4]{256}x\frac{2}{57} x 168 = $

Step 1: Evaluate roots

$\sqrt[3]{6859} = 19$ (since $19^3 = 6859$)
$\sqrt[4]{256} = 4$ (since $4^4 = 256$)

So expression becomes:
$\frac{19}{4} \times \frac{2}{57} \times 168$

Step 2: Simplify multiplication

First combine numbers:

$\frac{19 \times 2 \times 168}{4 \times 57}$

Numerator:
$19 \times 2 = 38$
$38 \times 168 = 6384$

Denominator:
$4 \times 57 = 228$

So:
$\frac{6384}{228}$

Step 3: Simplify fraction

Divide:
$6384 ÷ 228 = 28$

Final Answer: 28