<![CDATA[This study aims to explain students' mathematical processes in solving open-ended problems using a popular context from TikTok, specifically involving the calculation of the size of legit layer cake pieces as presented by the TikTok user Ci Mehong. Descriptive qualitative method is the research paradigm used to explain the mathematical process. The subjects were 81 eleventh-grade students who were instructed to take the test. Data collection was carried out by giving tests and diagnostic interviews conducted at the same time when students answered the questions, then the data were analyzed using a combination of thematic analysis techniques and flow models based on mathematical modeling indicators. The results showed numerical, graphical, algebraic, and verbal representation forms in the real situation-real world model process. In the real world model-mathematical modeling process, students demonstrated the use of diverse mathematical concepts, including cuboid volume, geometric sequences, exponents, and arithmetic operations. While in the mathematical modeling-mathematical result process, students derived results in volume and length units, which were then contextualized back to the real-world situation by making assumptions about the number of cake pieces per person.]]>
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