Помогите решить.390 156÷78 [638774-304×(617+89)]÷85=

<span> 3 метра 08 сантиметров - 308см</span>

<span><span>170 миллиметров - 17 см</span></span>

<span><span><span>6 метров 35 дециметров - 950см</span></span></span>

<span><span><span><span>15 километров- 15000 м</span></span></span></span>

<span><span><span><span><span> 8 километров 360 метров - 8360м</span></span></span></span></span>

<span><span><span><span><span><span>7300 дециметров - 730м</span></span></span></span></span></span>

<span><span><span><span><span><span><span> 58000 сантиметров - 0,58 м</span></span></span></span></span></span></span>